A compact Ti∶sapphire regenerative amplifier with bulk material as pulse stretcher is designed. Compared with the traditional structure stretcher, the bulk material stretcher is more consise and stable in structure. The laser pulses are compressed by a grismpair which combines together the gratings and prisms. Under the laser pumping conditions of 25 W, 527 nm and 1 kHz, the single pulse energy of output is 3.5 mJ, the repetition rate is 1 kHz, and the pulse width is 30 fs. The stability measurement shows that the power fluctuation in 8 hours is less than 0.7%.