Abstract: Starting from the tJ model in one dimension， the electron spectral function， dispersion relationship of the quasiparticles and the density of states were studied with the chargespin separation Fermionspin theory， and the behavior of the low energy quasiparticle peak in the holedoped cuprates were discussed in detail. The results showed that the low energy peaks in electron spectral function were well defined at all momenta， and the position of the peaks changed with the changes of the momenta and produced the dispersion with the momenta. The bandwidth energy scale of the energy band was controlled by the order of the magnetic interaction J. There also existed insulatormetal transition in quasi one dimension strong correlated models， the chemical potential moved to the top edge of the lower Hubbard band and the charge transport property increased with the increase of the holedoping. The unusual behavior of the electron spectrum and quasiparticle dispersion was related to the strong correlated interaction in the system and was the natural result of chargespin separation.

Key words: tJ model, chargespin separation Fermionspin theory, electronic structure, electron spectral function, strongly correlated cuprates