After about one minute the led blink red very fast(Photon)

Firmware
1 
#include "application.h"

// Choose external antenna for WiFi
STARTUP(WiFi.selectAntenna(ANT_AUTO));

// Run application thread separately from Wifi Thread
SYSTEM_MODE(SEMI_AUTOMATIC);
SYSTEM_THREAD(ENABLED);

void setup(void)
{
        Serial.begin(9600);

        //uart1_init();
}

void loop(void)
{
        if (!Particle.connected()) {
                //if (WiFi.hasCredentials()) {
                        Particle.connect();
                        for (int32_t i = 0; i < 100; i++) {
                                delay(20);
                                if (Particle.connected()) {
                                        break;
                                }
                        }
                //}
        }

        if (Particle.connected()) {
                /*try to publish data*/
                bool p_re = Particle.publish("new-data", "128degree", 10000);
                Serial.printf("publish done %d\r\n", p_re);
        }
        /*fall back to sleep to save power*/
        System.sleep(6);
}
2

I’d use waitFor() instead of your delay-loop to wait for connection.
Also sleeping the WiFi module for 6 seconds and then immediately trying to reestablish the connection is bound to cause troubles.
System.sleep(x) does not stop execution of loop().

BTW, the TTL parameter in your publish is not doing anything, you can just drop it and I’d also go with PRIVATE events instead of (currently default) PUBLIC.

3

I find this issue by chance.I am not going to use System.sleep().