Winks joined Spurs' academy in 2012 and made his Premier League debut as a substitute against Liverpool last month
His new deal will expire in 2021.
The 20-year-old midfielder has played only four times for Tottenham's first team so far but is highly-regarded by manager Mauricio Pochettino.
Winks has been named on the bench for three of Spurs' opening four league fixtures this season and impressed on the club's pre-season tour of Australia.
He has been capped by England at under-17, under-18, under-19 and under-20 levels.
Tottenham are in the process of negotiating new contracts for a number of first team players
Eric Dier and Christian Eriksen have already signed new deals this month while Jan Vertonghen and Erik Lamela are also in talks with the club
Source : PA
Source: PA