Caixin said the 2015 forecast was made by China Railway in a report it distributed at a national railway work conference.
It also said the 800 billion yuan target for this year could be adjusted based on investment demands, and could even surpass 2010's record investment of 842.65 billion yuan.
An official at China Railway's media department declined to comment on the forecast. The data was also not released on China Railway's website.
The government has signalled that it is keen to plough more cash into infrastructure both domestically and abroad as the economy slows, spurring the sector's stocks to their highest level since 2009.
On Jan. 16, the national planner approved $8.6 billion of railway projects in the northern and southwestern parts of China.
China Railway said on its website it spent 808.8 billion yuan in 2014 building 8,427 kilometres of new railway lines. The total rail network is now 112,000 kilometres long, while its high-speed rail network, already the world's longest, is now 16,000 kilometres long.
China Railway, formed after the Ministry of Railways was disbanded following a 2011 train crash, said it would focus its construction efforts this year on the central and western regions, and would vigorously promote local rail technology abroad.
Source: The Economic Times
China to Spend Additional $128 Billion on Railways this Year: Report