diff --git a/Ubiquitous/XiZi_IIoT/board/hc32f4a0/config.mk b/Ubiquitous/XiZi_IIoT/board/hc32f4a0/config.mk
index c52aca76a..ef43289d2 100644
--- a/Ubiquitous/XiZi_IIoT/board/hc32f4a0/config.mk
+++ b/Ubiquitous/XiZi_IIoT/board/hc32f4a0/config.mk
@@ -1,11 +1,11 @@
 export CROSS_COMPILE ?=/usr/bin/arm-none-eabi-
 
-export CFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -ffunction-sections -fdata-sections -Dgcc -O0 -gdwarf-2 -g -fgnu89-inline -Wa,-mimplicit-it=thumb -Werror
-export AFLAGS := -c -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -ffunction-sections -fdata-sections -x assembler-with-cpp -Wa,-mimplicit-it=thumb  -gdwarf-2
-export LFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -ffunction-sections -fdata-sections -Wl,--gc-sections,-Map=XiZi_hc32f4a0.map,-cref,-u,Reset_Handler -T $(BSP_ROOT)/link.lds
-export CXXFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -ffunction-sections -fdata-sections -Dgcc -O0 -gdwarf-2 -g -Werror
+export CFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -ffunction-sections -fdata-sections -Dgcc -O0 -gdwarf-2 -g -fgnu89-inline -Wa,-mimplicit-it=thumb -Werror
+export AFLAGS := -c -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -ffunction-sections -fdata-sections -x assembler-with-cpp -Wa,-mimplicit-it=thumb  -gdwarf-2
+export LFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -ffunction-sections -fdata-sections -Wl,--gc-sections,-Map=XiZi_hc32f4a0.map,-cref,-u,Reset_Handler -T $(BSP_ROOT)/link.lds
+export CXXFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -ffunction-sections -fdata-sections -Dgcc -O0 -gdwarf-2 -g -Werror
 
-export APPLFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -ffunction-sections -fdata-sections -Wl,--gc-sections,-Map=XiZi_app.map,-cref,-u, -T $(BSP_ROOT)/link_userspace.lds
+export APPLFLAGS := -mcpu=cortex-m4 -mthumb -mfpu=fpv4-sp-d16 -mfloat-abi=softfp -ffunction-sections -fdata-sections -Wl,--gc-sections,-Map=XiZi_app.map,-cref,-u, -T $(BSP_ROOT)/link_userspace.lds
 
 export DEFINES := -DHAVE_CCONFIG_H -DHC32F4A0 -DUSE_DDL_DRIVER -DHAVE_SIGINFO