There are many reports concerning to the restoring times, and the range of times are very wide. Author restored the artificial hatching silkworm eggs 1 ice pit (5$^{circ}C$) two different method; one restored in directly after protected following different times 24 hours, 48 hours and 72 hours of room temperature (24$^{circ}C$), another protected above suggested times and room temperature then indirectly keeping medium temperature (1$0^{circ}C$)6 hours. It was incubated in $25^{circ}C$ temperature after about 20 days of restoring. Pure line and hybrid silk warm eggs are no difference hatching ratio in 72 hours blocks by restoring. Especially good hatching ratio obtained by the medium temperature treatment rather than directly restoring.