Welcome in the forum.
Try to set the SPIS Tx pin to High-Z before going to sleep.
Thanks for your reply.
According to your suggestion,i added the related code(as shown below) in my project,but there is just a little change in the current of board(200uA).
(1)Is there any error in the code?
(2)And after wakeup , what do i need to do to recovery the SPI Slave communication,just to reconfigure the spi interface?
I would try the sequence (it's just a try)
SPI_Stop(),sleep,set the pins to Pin_DM_DIG_HIZ (not analog), deep sleep
and when woken up the reverse direction
SPI_Wakeup(), SPI_Init(), SPI_Start. The pins should be set by the Init API-
When still not working, I would suggest you to get in contact with Cypress directly: At top of this page select "Design support -> Create a Support Case" and ask your question. You will be helped by a Cypress engineer.