The recyeling of waste lead paste is the focus of the lead recyeling industry. Traditional fire smelting has issues with high energy consumption and heavy pollution. Wet conversion is a green and low-carbon recycling technology for waste lead paste, but its leaching efficieney and recycling of leaching agent need further improvement. In this study, triethylenetetramine (TETA) was used as a leaching agent to investigate the cyelic leaching of lead sulfate firom waste lead paste. An effective leaching model was established using the response surface method, and the leaching reaction parameters were optimized. With a TETA/PbSO_4 ratio of 1.3 : 1, a reaction time of 11 minutes, a liquid-solid ratio of 2 : 1, and a reaction temperature of 30 ℃, the predicted leaching rate of PbSO_4 was 99.99%, achieving an actual leaching rate of 99.93%. The apparent activation energy of PbSO_4 leaching reaction was found to be 47.5 kJ/mol. Furthermore, high-purity PbCO_3 with an impurity content of 0.0204% could be obtained from TETA-Pb solution by using Na_2CO_3. This process allows for the regeneration cycle of TETA while maintaining a leaching rate of lead sulfate above 90% in 10 cycles. The results provide a reference for the high-value utilization of waste lead paste.